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2006•Journal of Zhengzhou UniversityRequires access

Comparison of intraocular pressures at different parts of eyeballs by Tono-Pen applanation tonometer

Hao Yanyan

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Abstract

Aim: To explore the difference in intraocular pressure(IOP) on different part of the eye ball measured by Tono-Pen applanation tonometer. Methods: IOP on central cornea,limbus and sclera of 61 cases(99 eyes) were measured by Tono-Pen applanation tonometer. Results: IOP on central cornea,limbus and sclera were (2.52±0.74) kPa, ( 2.63± 0.79) kPa, (4.46±1.49) kPa,respectively. There was no statistical difference between the IOP on central cornea and the limbus(P0.05). IOP on sclera was higher than that on corneal center,and they were positively correlated ( r= 0.542, P=0.000). The linear equation was Y=1.824+0.104X(X≤2.793 kPa) and Y=1.493+0.359(X 2.793 kPa) (Y:IOP on centralcornea;X:IOP on sclera).Conclusion: IOP on sclera measured by Tono-Pen is reliable;IOP measured by Tono-Pen at any part of cornea is accurate.

About this research paper

What this paper is about

Aim: To explore the difference in intraocular pressure(IOP) on different part of the eye ball measured by Tono-Pen applanation tonometer. Methods: IOP on central cornea,limbus and sclera of 61 cases(99 eyes) were measured by Tono-Pen applanation tonometer. Results: IOP on central cornea,limbus and sclera were (2.52±0.74) kPa, ( 2.63± 0.79) kPa, (4.46±1.49) kPa,respectively. There was no statistical difference between the IOP on central cornea and the limbus(P0.05). IOP on sclera was higher than that on corneal center,and they were positively correlated ( r= 0.542, P=0.000). The linear equation was Y=1.824+0.104X(X≤2.793 kPa) and Y=1.493+0.359(X 2.793 kPa) (Y:IOP on centralcornea;X:IOP on sclera).Conclusion: IOP on sclera measured by Tono-Pen is reliable;IOP measured by Tono-Pen at any part of cornea is accurate.

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Available abstract

Aim: To explore the difference in intraocular pressure(IOP) on different part of the eye ball measured by Tono-Pen applanation tonometer. Methods: IOP on central cornea,limbus and sclera of 61 cases(99 eyes) were measured by Tono-Pen applanation tonometer. Results: IOP on central cornea,limbus and sclera were (2.52±0.74) kPa, ( 2.63± 0.79) kPa, (4.46±1.49) kPa,respectively. There was no statistical difference between the IOP on central cornea and the limbus(P0.05). IOP on sclera was higher than that on corneal center,and they were positively correlated ( r= 0.542, P=0.000). The linear equation was Y=1.824+0.104X(X≤2.793 kPa) and Y=1.493+0.359(X 2.793 kPa) (Y:IOP on centralcornea;X:IOP on sclera).Conclusion: IOP on sclera measured by Tono-Pen is reliable;IOP measured by Tono-Pen at any part of cornea is accurate.

Key concepts: Sclera, Medicine, Goldmann Applanation Tonometer, Ophthalmology, Cornea, Intraocular pressure, Significant difference, Applanation tonometry

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